CONPRICI-Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali, Università di Pisa, via Diotisalvi n.2, 56126 Pisa, Italy.
J Hazard Mater. 2009 Dec 15;172(1):447-56. doi: 10.1016/j.jhazmat.2009.07.029. Epub 2009 Jul 15.
The improvement of passive fire protection of storage vessels is a key factor to enhance safety among the LPG distribution chain. A thermal and mechanical model based on finite elements simulations was developed to assess the behaviour of full size tanks used for LPG storage and transportation in fire engulfment scenarios. The model was validated by experimental results. A specific analysis of the performance of four different reference coating materials was then carried out, also defining specific key performance indicators (KPIs) to assess design safety margins in near-miss simulations. The results confirmed the wide influence of coating application on the expected vessel time to failure due to fire engulfment. A quite different performance of the alternative coating materials was evidenced. General correlations were developed among the vessel time to failure and the effective coating thickness in full engulfment scenarios, providing a preliminary assessment of the coating thickness required to prevent tank rupture for a given time lapse. The KPIs defined allowed the assessment of the available safety margins in the reference scenarios analyzed and of the robustness of thermal protection design.
提高储存容器的被动防火性能是增强液化石油气分配链安全性的关键因素。本文基于有限元模拟开发了一个热-力学模型，以评估在火灾环境下用于液化石油气储存和运输的全尺寸储罐的行为。该模型通过实验结果进行了验证。然后，对四种不同参考涂层材料的性能进行了专门分析，还定义了特定的关键性能指标 (KPI)，以评估近距模拟中的设计安全裕度。结果证实了涂层应用对因火灾而导致容器失效时间的广泛影响。替代涂层材料的性能有明显差异。在完全包裹的情况下，建立了容器失效时间与有效涂层厚度之间的一般相关性，为给定时间间隔内防止罐破裂所需的涂层厚度提供了初步评估。定义的 KPI 允许评估所分析参考场景中的可用安全裕度和热保护设计的稳健性。
